JPS6455511A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS6455511A
JPS6455511A JP21167487A JP21167487A JPS6455511A JP S6455511 A JPS6455511 A JP S6455511A JP 21167487 A JP21167487 A JP 21167487A JP 21167487 A JP21167487 A JP 21167487A JP S6455511 A JPS6455511 A JP S6455511A
Authority
JP
Japan
Prior art keywords
group
lens
constitution
power
object side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21167487A
Other languages
Japanese (ja)
Inventor
Hiroyuki Hamano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP21167487A priority Critical patent/JPS6455511A/en
Priority to US06/233,486 priority patent/US4832471A/en
Publication of JPS6455511A publication Critical patent/JPS6455511A/en
Pending legal-status Critical Current

Links

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  • Lenses (AREA)

Abstract

PURPOSE:To excellently compensate aberrations and to obtain excellent optical performance over the entire power variation range by specifying 4th constitution and 5th constitution and making respective lens elements meet specific requirements as to a zoom type lens for focusing, power variation, compensation, luminous flux collimation, and image formation. CONSTITUTION:A group III is arranged successively to groups I and II for focusing which have positive refracting power and negative refracting power to compensate an image plane which varies as the power is varied, a group IV with positive refracting power collimates divergent luminous flux from the group III into parallel luminous flux, and a group V with a fixed image forming function and a fixed stop SP are arranged. The group IV consists of a biconvex lens which as its large-curvature refracting surface on the object side and the group IV consists of six lenses which have large-curvature convex or concave refracting surfaces on the object side in order from the object side. Further, five inequalities hold, where Rij is the radius of a (j)th lens in an (i)th group, Dij the lens thickness of air gap, Fi the focal length of the (i)th group, and FT the focal length of the whole system. With this constitution, the short zoom lens is obtained which has an about 1.4 large aperture ratio and excellent performance.
JP21167487A 1987-08-26 1987-08-26 Zoom lens Pending JPS6455511A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP21167487A JPS6455511A (en) 1987-08-26 1987-08-26 Zoom lens
US06/233,486 US4832471A (en) 1987-08-26 1988-08-17 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21167487A JPS6455511A (en) 1987-08-26 1987-08-26 Zoom lens

Publications (1)

Publication Number Publication Date
JPS6455511A true JPS6455511A (en) 1989-03-02

Family

ID=16609715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21167487A Pending JPS6455511A (en) 1987-08-26 1987-08-26 Zoom lens

Country Status (1)

Country Link
JP (1) JPS6455511A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0256052A (en) * 1980-05-30 1990-02-26 Bull Sa Apparatus for signal transmission between two data processing means
US7116489B2 (en) * 2004-09-30 2006-10-03 Sony Corporation Zoom lens and imaging device

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49900A (en) * 1972-03-10 1974-01-07
JPS5758111A (en) * 1980-09-25 1982-04-07 Canon Inc Optical system having focus detector
JPS58153913A (en) * 1982-03-08 1983-09-13 Canon Inc Zoom lens
JPS5918919A (en) * 1982-07-23 1984-01-31 Canon Inc Zoom lens
JPS59222807A (en) * 1983-05-31 1984-12-14 Canon Inc Zoom lens
JPS6051813A (en) * 1983-08-31 1985-03-23 Canon Inc Zoom lens
JPS60168114A (en) * 1984-02-10 1985-08-31 Canon Inc Zoom lens provided with function for transferring zoom area
JPS60208723A (en) * 1984-04-02 1985-10-21 Canon Inc Fast zoom lens of high variable power
JPS60230112A (en) * 1984-04-27 1985-11-15 Asahi Optical Co Ltd Large aperture compact zoom lens
JPS60260913A (en) * 1984-06-08 1985-12-24 Canon Inc Zoom lens of large aperture ratio
JPS6120921A (en) * 1984-07-09 1986-01-29 Canon Inc Large aperture zoom lens
JPS6193423A (en) * 1984-10-12 1986-05-12 Minolta Camera Co Ltd Larger aperture ratio zoom lens
JPS61169809A (en) * 1985-01-23 1986-07-31 Canon Inc Variable focal length lens
JPS61182012A (en) * 1985-02-07 1986-08-14 Minolta Camera Co Ltd Zoom lens having large aperture ratio
JPS61259219A (en) * 1985-05-14 1986-11-17 Canon Inc Zoom lens
JPS61259218A (en) * 1985-05-14 1986-11-17 Canon Inc Zoom lens
JPS6291908A (en) * 1985-10-18 1987-04-27 Konishiroku Photo Ind Co Ltd Zoom lens
JPS62170926A (en) * 1986-01-23 1987-07-28 Konishiroku Photo Ind Co Ltd Zoom lens
JPS62173420A (en) * 1986-01-27 1987-07-30 Canon Inc Photographing system having refractive index distribution type optical member
JPS62173421A (en) * 1986-01-28 1987-07-30 Canon Inc Zoom lens

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49900A (en) * 1972-03-10 1974-01-07
JPS5758111A (en) * 1980-09-25 1982-04-07 Canon Inc Optical system having focus detector
JPS58153913A (en) * 1982-03-08 1983-09-13 Canon Inc Zoom lens
JPS5918919A (en) * 1982-07-23 1984-01-31 Canon Inc Zoom lens
JPS59222807A (en) * 1983-05-31 1984-12-14 Canon Inc Zoom lens
JPS6051813A (en) * 1983-08-31 1985-03-23 Canon Inc Zoom lens
JPS60168114A (en) * 1984-02-10 1985-08-31 Canon Inc Zoom lens provided with function for transferring zoom area
JPS60208723A (en) * 1984-04-02 1985-10-21 Canon Inc Fast zoom lens of high variable power
JPS60230112A (en) * 1984-04-27 1985-11-15 Asahi Optical Co Ltd Large aperture compact zoom lens
JPS60260913A (en) * 1984-06-08 1985-12-24 Canon Inc Zoom lens of large aperture ratio
JPS6120921A (en) * 1984-07-09 1986-01-29 Canon Inc Large aperture zoom lens
JPS6193423A (en) * 1984-10-12 1986-05-12 Minolta Camera Co Ltd Larger aperture ratio zoom lens
JPS61169809A (en) * 1985-01-23 1986-07-31 Canon Inc Variable focal length lens
JPS61182012A (en) * 1985-02-07 1986-08-14 Minolta Camera Co Ltd Zoom lens having large aperture ratio
JPS61259219A (en) * 1985-05-14 1986-11-17 Canon Inc Zoom lens
JPS61259218A (en) * 1985-05-14 1986-11-17 Canon Inc Zoom lens
JPS6291908A (en) * 1985-10-18 1987-04-27 Konishiroku Photo Ind Co Ltd Zoom lens
JPS62170926A (en) * 1986-01-23 1987-07-28 Konishiroku Photo Ind Co Ltd Zoom lens
JPS62173420A (en) * 1986-01-27 1987-07-30 Canon Inc Photographing system having refractive index distribution type optical member
JPS62173421A (en) * 1986-01-28 1987-07-30 Canon Inc Zoom lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0256052A (en) * 1980-05-30 1990-02-26 Bull Sa Apparatus for signal transmission between two data processing means
US7116489B2 (en) * 2004-09-30 2006-10-03 Sony Corporation Zoom lens and imaging device

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